题目内容

计算(能简算的要简算)
34
13
-(
4
15
+
2
5
[1-(
1
4
+
3
8
)]÷
1
4
2-
3
8
÷
7
16
-
1
7
2
3
×
8
5
+
1
3
÷
5
8
(1)
34
13
-(
4
15
+
2
5
),
=
34
13
-
2
3

=
76
39


(2)[1-(
1
4
+
3
8
)]÷
1
4

=[1-
5
8
1
4

=
3
8
÷
1
4

=
3
2


(3)2-
3
8
÷
7
16
-
1
7

=2-
6
7
-
1
7

=2-(
6
7
+
1
7
),
=2-1,
=1;

(4)
2
3
×
8
5
+
1
3
÷
5
8

=
2
3
×
8
5
+
1
3
×
8
5

=(
2
3
+
1
3
)×
8
5

=1×
8
5

=
8
5
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